|
True/False
Indicate whether the sentence or statement is true
or false.
|
|
|
1.
|
Sponges are filter feeders.
|
|
|
2.
|
Sponges are capable of total regeneration, even from the smallest pieces of their
bodies.
|
|
|
3.
|
Polyps are a body form of cnidarians that are specialized for swimming.
|
|
|
4.
|
Cnidarians are characterized by stinging nematocysts.
|
|
|
5.
|
The
life cycle of anthozoans includes medusae, planulae, and polyps.
|
|
|
6.
|
Ctenophores lack a nervous system that coordinates their activities, so their
movements are erratic.
|
Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
|
|
|
7.
|
Refer
to the illustration above. Which organism in the diagrams is most closely related to a
jellyfish? a. | Organism
“A” | c. | Organism
“C” | b. | Organism “B” | d. | Organism “D” | | | | |
|
|
|
8.
|
Spicules are a. | flexible protein fibers. | b. | hard needle-like
structures in the wall of a sponge. | c. | similar to seeds; a complete sponge can grow from each
spicule. | d. | used for taking in food and water. | | |
|
|
|
9.
|
Skeletal support in sponges may be provided by a. | spicules of
calcium carbonate. | c. | spongin
fibers. | b. | spicules of silicon dioxide. | d. | All of the above | | | | |
|
|
|
10.
|
Sponges obtain food a. | by photosynthesis. | b. | by using their
spicules to paralyze protozoa. | c. | by filtering small organisms from the
water. | d. | with spongin. | | |
|
|
|
11.
|
In
sponges, currents that draw water through the organism are created by a. | amoebocytes. | c. | gemmules. | b. | collar cells. | d. | spicules. | | | | |
|
|
|
12.
|
Hermaphroditic organisms a. | reproduce only by asexual means. | b. | produce both
eggs and sperm. | c. | have gemmules that are fertilized by
amoebocytes. | d. | possess only male
amoebocytes. | | |
|
|
|
13.
|
Sponges can reproduce a. | by the budding of new sponges from the
parent. | b. | by a breakup of the original parent into fragments that each
become a new sponge. | c. | sexually, using the production of sperm and
eggs. | d. | All of the above | | |
|
|
|
14.
|
freshwater sponges : gemmules :: a. | hermaphrodites : eggs and sperm | c. | gemmules : sperms | b. | gemmules :
eggs | d. | amoebocytes :
eggs | | | | |
|
|
|
|
|
|
15.
|
Refer
to the illustration above. Which organism in the diagrams captures its prey using
nematocysts? a. | Organism
“A” | c. | Organism
“C” | b. | Organism “B” | d. | Organism “D” | | | | |
|
|
|
16.
|
The
outer cell layer of a cnidarian is the a. | ectoderm. | c. | endoderm. | b. | mesoglea. | d. | epidermis. | | | | |
|
|
|
17.
|
The
phylum Cnidaria includes all of the following except a. | jellyfish. | c. | sea
anemones. | b. | squids. | d. | corals. | | | | |
|
|
|
18.
|
Sea
anemones are a. | medusae. | c. | larvae. | b. | polyps. | d. | eggs. | | | | |
|
|
|
The
diagram below illustrates the life cycle of the jellyfish.
|
|
|
19.
|
Refer
to the illustration above. Which stage is called a planula? a. | Stage
“1” | c. | Stage
“3” | b. | Stage “2” | d. | None of the above | | | | |
|
|
|
20.
|
Anthozoans include organisms known as a. | jellyfish. | c. | Portuguese
men-of-war. | b. | hydras. | d. | sea anemones and corals. | | | | |
|
